Quintessential Kination and Thermal Production of SUSY e-WIMPs

Details Quintessential Kination and Thermal Production of SUSY e-WIMPs Quintessential Kination and Thermal Production of SUSY e-WIMPs

2008-09-11

arxiv.org/abs/0809.1982v1

AIP Conf.Proc.1115:157-162,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

To appear in the proceedings of 4th International Workshop On The Dark Side Of The Universe (DSU 2008) 1-5 Jun 2008, Cairo, Eg

Scientific paper

10.1063/1.3131490

The impact of a kination-dominated phase generated by a quintessential exponential model on the thermal abundance of Supersymmetric (SUSY) extremely Weekly Interacting Massive Particles (e-WIMPs) is investigated. For values of the quintessential energy-density parameter on the eve of nucleosynthesis close to its upper bound, we find that: (i) the gravitino constraint is totally evaded for unstable gravitinos; (ii) the thermal abundance of stable gravitinos is not sufficient to account for the cold dark matter of the universe; (iii) the thermal abundance of axinos can satisfy the cold dark matter constraint for values of the initial (``reheating'') temperature well above those required in the standard cosmology.

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